Robert Macy said:
This is the cheapest DVD player on the market, from Samsung, under the
label GO Video
Some DVD's it sounds like gravel grinding away. Often louder than the
soundtrack. Sometimes no noise, sometimes awful.
Question:
What is this sound? stepper motor trying to track? or what?
plus, as with most noises, does this mean the life of the unit is
being shortened?
Robert
Usually, it is the lens suspension 'singing' that kicks up tracking noise.
The focus and tracking motors are just coils that operate in a magnetic
field to move the lens up and down (focus) and side to side (tracking) and
are thus like a tiny 'loudspeaker'. If the lens is being driven by a
'scruffy' tracking or focus signal, the usual result is the audible whistle
/ hiss / grinding noise, which can be quite loud, but I would stop short of
saying that I have ever heard it louder than the soundtrack, except where it
is just quiet dialogue. The normal cause of a scruffy signal, is a marked,
scuffed or scratched disc, but there are some automatic servo gain control
faults that can cause similar symptoms. Have you checked any discs that are
affected to make sure that they are clean / undamaged ? Are the same discs
always affected in the same way ? When doing it, are they playing 'normally'
in terms of picture and sound ?
It is also possible to get loading problems which can cause a disc to
mechanically drag on the edge of the tray, and also to get partially
collapsed deck suspension rubbers or springs, which can cause intermittent
mechanical drag issues. Because DVD discs rotate at such high speed, even a
slight drag makes a lot of noise, but will often allow the disc to play
normally. If you can catch it doing it, and whip the lid off to take a look,
it should be obvious if it is a mechanical issue, unless it's one of those
machines that uses a computer-style drive, that's fully covered in ...
Arfa